The 31 is available in two different versions: the aft cabin model and the aft cockpit model. The aft-cabin model has a private sleeping area away from the main cabin, which also proves to be an ideal and safe place for small children to play under easy supervision; as well, additional bunks are in the main cabin. The aft cockpit model has an open and longer cockpit in place of the aft cabin, and the main cabin is also larger and features an interior configuration that easily converts from day to night requirements; as well, a table and extra bunk slide completely out of the way when not in use. All models have ample accommodations for five. Other than the different berth arrangements, the aft-cockpit and aft-cabin model interiors are similar and include six-foot, two-inch standing headroom, a large double V-berth forward, an enclosed head, and a galley area with a two-burner stove, sink, and a large molded countertop. Large storage compartments in each float augment the plentiful stowage in the cabins. The cockpit comfortably seats six adults, though this is seldom necessary as the broad decks and nets give the crew many other comfortable places to spread out and relax. The forward hull shape effectively deflects spray away from the cockpit, and winches, halyards and sheets, and the controls for the daggerboard, rudder, and outboard motor can all be operated from the cockpit. A transom swim step provides easy access on and off the boat. The fractional rotating rig is very efficient and easy to handle in all conditions The fully battened mainsail has a roller furler boom on the aft-cabin model and slab or jiffy reefing on the aft-cockpit model. An asymmetrical spinnaker flown from the retractable carbon bowsprit really enhances off-wind performance.A daggerboard provides efficient windward performance; this, along with the kickup rudder, enables the 31 to moor in very shallow water or even be beached.